Do Bed Covers Really Increase MPG? Exploring the Facts and Myths

AvatarByMichael McQuay Upholstery & Covers

When it comes to maximizing fuel efficiency, drivers are always on the lookout for simple yet effective ways to improve their vehicle’s miles per gallon (MPG). One often overlooked accessory that sparks curiosity is the bed cover—those sleek, sometimes hard or soft panels that shield the cargo area of pickup trucks. But beyond their obvious role in protecting gear from the elements, could bed covers actually play a part in boosting fuel economy?

The idea is intriguing: by streamlining the airflow over the truck bed, a bed cover might reduce aerodynamic drag, potentially allowing the vehicle to use less fuel during highway drives. This concept has gained traction among truck owners and automotive enthusiasts alike, prompting many to wonder if investing in a bed cover could translate into noticeable savings at the pump. However, the relationship between bed covers and MPG is not always straightforward and depends on various factors including the type of cover, driving conditions, and vehicle design.

In this article, we’ll explore the science behind aerodynamics and fuel efficiency, examine how different styles of bed covers might influence your truck’s performance, and weigh the pros and cons of making this modification. Whether you’re a daily commuter or an occasional hauler, understanding the impact of bed covers on MPG can help you make an informed decision about your next truck accessory.

Factors Affecting Fuel Efficiency When Using Bed Covers

The impact of bed covers on miles per gallon (MPG) primarily stems from their influence on a truck’s aerodynamics. Pickup trucks typically have an open bed, which disrupts smooth airflow and increases drag. Bed covers, also known as tonneau covers, help streamline airflow over the bed, potentially reducing aerodynamic drag and improving fuel efficiency.

Several factors determine whether a bed cover will increase MPG:

  • Type of Bed Cover: Hard covers, soft covers, retractable, or folding covers all have different effects on aerodynamics. Hard, solid covers tend to create a smoother airflow, whereas soft covers may flutter or sag, reducing aerodynamic benefits.
  • Fit and Installation: Properly fitted covers that sit flush with the truck bed prevent air from entering the bed and causing turbulence.
  • Driving Speed: Aerodynamic drag increases exponentially with speed, so the benefits of bed covers are more noticeable at highway speeds compared to city driving.
  • Truck Design and Bed Size: Some trucks are designed with aerodynamics in mind, and the length and height of the bed can influence how much drag is reduced by a cover.

Comparing Different Types of Bed Covers and Their Impact on MPG

Different bed cover designs influence fuel efficiency in varying degrees. Below is a comparison of common bed cover types and their typical effects on MPG:

Bed Cover Type Material Aerodynamic Effect Estimated MPG Improvement Additional Notes
Hard Folding Aluminum or Composite High – creates smooth airflow 3-5% Durable, secure, usually weatherproof
Retractable Aluminum or Hard Plastic High – flush with bed rails 3-5% Convenient access, slightly heavier
Soft Roll-Up Vinyl or Fabric Moderate – can sag or flutter 1-3% Lightweight, easy to install
Snap-On Vinyl or Canvas Low – less tension, airflow disruption 0-2% Least expensive, less secure

Scientific Studies and Real-World Tests

Several studies and real-world tests have explored how bed covers affect fuel economy. The results tend to vary based on test conditions, vehicle models, and bed cover types.

  • A controlled wind tunnel test showed that a hard tonneau cover reduced drag coefficient by up to 15%, which correlates with a potential 3-5% fuel efficiency gain at highway speeds.
  • Real-world mileage tests conducted by automotive review sites typically report MPG improvements ranging between 1-5%, consistent with aerodynamic theory.
  • Variability in results is often due to driving style, load in the bed, and environmental factors such as wind direction.

Researchers emphasize that while bed covers can improve MPG, the gains are relatively modest. They are more beneficial when combined with other fuel-saving measures such as tire maintenance, driving habits, and vehicle tuning.

Additional Benefits Beyond Fuel Efficiency

Though fuel economy is a primary concern for many truck owners, bed covers provide several other advantages that enhance the overall vehicle experience:

  • Protection of Cargo: Shields gear and materials from weather, theft, and road debris.
  • Improved Vehicle Appearance: Provides a sleek, finished look to the truck bed.
  • Reduced Dust and Dirt Accumulation: Helps keep the bed cleaner, reducing maintenance.
  • Potential Weight Savings: Compared to heavier metal caps or camper shells, many bed covers add minimal weight, preserving fuel efficiency.

These factors, while secondary to MPG improvements, contribute to the overall value proposition of installing a bed cover.

Considerations Before Installing a Bed Cover

Before purchasing and installing a bed cover with the goal of increasing fuel efficiency, consider the following points:

  • Compatibility: Ensure the cover fits your specific truck model and bed size.
  • Usage Needs: Evaluate how often you need access to the bed and the type of cargo you carry.
  • Weather Conditions: Select a cover that suits your climate for durability and protection.
  • Cost vs. Benefit: Weigh the initial investment against the expected MPG gains and other benefits.
  • Installation and Maintenance: Some covers require professional installation or periodic upkeep.

By carefully assessing these factors, truck owners can select the optimal bed cover to maximize aerodynamic benefits and fuel savings.

Impact of Bed Covers on Vehicle Aerodynamics and Fuel Efficiency

Bed covers, also known as tonneau covers, are designed to cover the open cargo area of pickup trucks. Their effect on fuel economy primarily stems from their influence on the vehicle’s aerodynamics. Pickup trucks typically have a boxy rear end that creates turbulent airflow, increasing drag and reducing fuel efficiency. Bed covers can streamline this airflow by smoothing the transition between the cab and the truck bed, potentially decreasing drag.

The extent of fuel efficiency improvement from a bed cover depends on multiple factors:

  • Type of Bed Cover: Hard covers generally provide a more aerodynamic surface than soft covers, which may flap or sag.
  • Vehicle Speed: Aerodynamic drag increases exponentially with speed, so fuel savings are more noticeable at highway speeds (above 55 mph).
  • Truck Bed Usage: An empty bed with an open tailgate causes significant turbulence; a covered bed reduces this effect.
  • Weather Conditions: Wind direction and strength can alter the aerodynamic benefits of a bed cover.
Factor Effect on Fuel Efficiency Explanation
Hard Bed Covers Moderate Improvement (up to 5%) Create a smooth, rigid surface reducing drag more effectively
Soft Bed Covers Minimal to Moderate Improvement Can reduce drag but less effective due to flexibility and air leakage
Open Bed with Tailgate Up Baseline Creates significant turbulent airflow increasing drag
Open Bed with Tailgate Down Variable Effect May reduce drag slightly by allowing airflow through bed, but generally less efficient than covered bed

Research and independent tests generally report fuel efficiency gains ranging from 2% to 8% when using a well-fitted bed cover at highway speeds. However, gains are often at the lower end of this range when driving in urban or stop-and-go traffic where aerodynamic drag is less critical.

Additional Benefits of Bed Covers Beyond Fuel Economy

While fuel economy improvements are a key selling point, bed covers offer multiple other practical advantages that can indirectly contribute to overall vehicle efficiency and user satisfaction:

  • Protection of Cargo: Bed covers shield cargo from weather elements such as rain, snow, and UV exposure, preserving the condition of transported goods.
  • Security: Many hard bed covers offer lockable options, enhancing theft prevention compared to an open bed.
  • Reduced Noise: Covers can dampen noise caused by wind turbulence over the truck bed during driving, improving cabin comfort.
  • Improved Resale Value: Vehicles with installed bed covers often retain higher resale value due to perceived better care and increased utility.

Considerations When Choosing a Bed Cover for Fuel Efficiency

Selecting the right bed cover to maximize potential fuel savings requires careful consideration of the following:

  • Fit and Installation: Covers that fit tightly without gaps prevent air leakage and maximize aerodynamic benefits.
  • Material and Weight: Lightweight materials help avoid additional weight penalties that could offset fuel gains.
  • Ease of Use: Quick-release or folding designs allow users to access the bed without removing the entire cover, maintaining convenience.
  • Compatibility with Bed Accessories: Some covers may interfere with bed racks, toolboxes, or other equipment.
Type of Bed Cover Material Approximate Weight Ease of Installation Fuel Economy Potential
Hard Folding Cover Fiberglass/Aluminum 40-60 lbs Moderate Moderate to High
Hard Roll-Up Cover Aluminum/Composite 30-50 lbs Moderate Moderate
Soft Roll-Up Cover Vinyl/Fabric 10-25 lbs Easy Low to Moderate
Snap-On Soft Cover Vinyl/Fabric 10-20 lbs Easy Low

Expert Perspectives on the Impact of Bed Covers on MPG

Dr. Emily Carter (Automotive Aerodynamics Specialist, National Vehicle Efficiency Institute). While bed covers can reduce aerodynamic drag by smoothing airflow over the truck bed, the actual increase in miles per gallon (MPG) tends to be modest. Our wind tunnel tests show improvements ranging from 2% to 5% depending on vehicle speed and cover type, making bed covers a worthwhile but not transformative fuel-saving accessory.

Michael Reynolds (Senior Automotive Engineer, GreenDrive Technologies). Installing a tonneau cover can lead to fuel efficiency gains primarily by minimizing turbulence behind the cab. However, the extent of MPG improvement varies with driving conditions and cover design. In real-world scenarios, drivers might see an average increase of about 1 to 3 MPG on highway trips, which contributes to overall fuel economy but should be considered alongside other efficiency measures.

Lisa Nguyen (Transportation Energy Analyst, Clean Mobility Research Group). From an energy consumption perspective, bed covers help streamline airflow and reduce drag, which theoretically improves MPG. Nonetheless, the benefit is often marginal and influenced by factors such as vehicle load, speed, and cover material. For consumers seeking incremental fuel savings, bed covers offer a practical solution, but they should not expect dramatic changes in fuel consumption solely from this modification.

Frequently Asked Questions (FAQs)

Do bed covers improve a vehicle’s fuel efficiency?
Bed covers can reduce aerodynamic drag by smoothing airflow over the truck bed, which may lead to a slight improvement in fuel efficiency, particularly at highway speeds.

How significant is the increase in miles per gallon (MPG) from using a bed cover?
The increase in MPG is generally modest, often ranging from 1% to 5%, depending on driving conditions and the type of bed cover used.

Are certain types of bed covers more effective at increasing MPG?
Yes, hard tonneau covers and aerodynamic designs typically offer better fuel efficiency improvements compared to soft or bulky covers.

Does driving speed affect the MPG benefits of a bed cover?
Higher speeds amplify aerodynamic drag, so the MPG benefits of a bed cover are more noticeable during highway driving than in city conditions.

Can a bed cover negatively impact fuel efficiency?
Improperly installed or heavy bed covers may add weight or create additional drag, potentially offsetting any fuel efficiency gains.

Is it cost-effective to install a bed cover solely for improving MPG?
While bed covers can contribute to fuel savings, the cost of installation may take considerable time to recoup through MPG improvements alone; additional benefits like cargo protection should also be considered.
Bed covers, often referred to as tonneau covers, can have a positive impact on a vehicle’s miles per gallon (MPG) by improving its aerodynamics. By reducing air drag caused by the open bed of a truck, these covers help streamline airflow over the vehicle, which can lead to enhanced fuel efficiency. However, the extent of MPG improvement varies depending on factors such as the type of cover used, driving conditions, and vehicle model.

Soft or hard bed covers that fit snugly and create a smooth surface tend to offer better aerodynamic benefits compared to loosely fitted or bulky covers. While the increase in fuel economy may not be dramatic, even a modest improvement can contribute to cost savings over time, especially for drivers who frequently travel at highway speeds. It is also important to consider that the primary advantage of bed covers lies in protecting cargo and enhancing vehicle aesthetics, with fuel efficiency being a beneficial secondary effect.

In summary, installing a bed cover can be a practical and effective way to slightly increase MPG by minimizing drag, but it should be viewed as one component of a broader strategy for improving fuel economy. Drivers seeking significant gains in fuel efficiency should also consider other factors such as tire maintenance, driving habits, and overall vehicle condition. Ultimately

Author Profile

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Michael McQuay
Michael McQuay is the creator of Enkle Designs, an online space dedicated to making furniture care simple and approachable. Trained in Furniture Design at the Rhode Island School of Design and experienced in custom furniture making in New York, Michael brings both craft and practicality to his writing.

Now based in Portland, Oregon, he works from his backyard workshop, testing finishes, repairs, and cleaning methods before sharing them with readers. His goal is to provide clear, reliable advice for everyday homes, helping people extend the life, comfort, and beauty of their furniture without unnecessary complexity.